Have a number of Chinese IDN mini sites that were in some cases getting 100+ hits per day and making a fair few $'s via adsense. The last couple of weeks have seen the traffic all but disappear and of course the income.

The same thing is happening with my "full blown" site 搞笑.cn, most of the traffic for all the sites came from page positions on Baidu, some of which were page one and have now disappeared up their own orifices.

from my experience, baidu's a harder nut to crack than google. they are very good at sniffling out parking pages and minisites.

it is not easy to earn yuan. there is too much competition and the currency is small.

Build mini-sites optimized for the very long tail in lucrative niches, in the euro markets. Play at the end of the tail, you know where the results are counted in the hundreds or only a couple thousand... You can sit at the top with no effort.

I've got two of these one pagers in finnish, one up for 2 years and the other for 1 year. The first one earns about 2000 EUR per year and the second one about 800 EUR. The first one, which is a very long two-word combo domain that nobody would ever just intuitively type-in, but a highly searched term, has become somewhat famous in finland: after about a year in operation, it started receiving lots of type-ins (people tell others about it, word of mouth).